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The head of the drum, the part that is struck by drum sticks, vibrates.
The "electronic" of the keyboard which is hit by the keys touching it.
the head If you mean a drummers drumstick it is called the tip.
It is the metal part around the outside of the drum that is around the drum head.
The ear.
the bottom head
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drum head
The head of the drum vibrates when struck. However, the whole drum reverberateswith that vibration. This is what gives the drum its tonal quality.
conga drum
head
Tympanic membrane